【正文】 characteristics point E the largest displacement, but the speed is zero. Feature points in different vibration frequency calculation, the precision is different, such as point A and point C than at point B and D Greater uncertainty, because the two points A and C the speed of 0, that x in the vicinity of these two changes in level. Therefore, if x maximum points for the criterion of looking for A or C errors. In contrast, point B and point D the larger changes in the vicinity of x, therefore, 本科生畢業(yè)設(shè)計(jì)（論文） 29 choose to feature point B and point D will be calculated more accurately the vibration cycle. Point B and point D should be the criterion variable symbols x, as the existence of。 Feature Point C displacement of the smallest, but the speed is zero。 second is embodied in the same location , different values of the damping force. The reason for this is the same as the difference between the speed of position, Through various positions to achieve the speed of the amendment. Speed characteristics of the deviation pensation. Institutions and ideals of the actual error in the speed of the movement embodies the characteristic curves for different values of the damping force, in particular, the damping force is the biggest difference. The reason for this is the speed at different locations of the error. Incentives in the same frequency, the actual body velocity is greater than the velocity of the ideal body. In accordance with the laws of the speed of the interpolation error pensation amendment. Compensation measures for more than programmed in the test data is processed Now. 本科生畢業(yè)設(shè)計(jì)（論文） 28 1 ? 3 Shock Absorber vibration frequency identification and control methods Shock Absorber Dynamometer testing and speed characteristics, it is important to correct the rapid detection of vibration frequency in order to control the velocity of the shock absorber and sampling rate. Damper vibration frequency can be measured by testing instruments, and puter control, but this will increase the cost. The system uses the original manufacturers manual stepless speed regulation, and the methods used to manually adjust the governor in order to adjust the motor speed, adjust the damper to achieve the purpose of vibration frequency. System test software to calculate the vibration frequency, and frequency values on the puter screen in realtime display with manual frequency control damper. Determination of vibration frequency shock absorber is as follows. Figure 2 is a shock absorber test the crank connecting rod mechanism Taichung piston displacement x, velocity v crank angle α with the cyclical changes in the diagram, as long as you can to find campaign cycle to calculate the frequency of movement. A map feature point displacement of the largest, but the speed is zero。 大學(xué)學(xué)習(xí)生活中， XXXX 學(xué)院各位老師在學(xué)業(yè)上給我的指導(dǎo)，尤其是各位老師一絲不茍的治學(xué)風(fēng)范對(duì)我的影響很大；在 畢業(yè)設(shè)計(jì) 過程中，各位老 師給予了大力的支持和幫助，并就 設(shè)計(jì) 中的部分問題和處理方法共同進(jìn)行了有益的探討，在此一并向他們致以誠摯的謝意！在此也對(duì)審閱和評(píng)議本 畢業(yè)設(shè)計(jì) 及答辯老師和教授致以崇高的敬意和誠摯的感謝！ 最后，對(duì)在大學(xué)期間關(guān)心與幫助過我的其他所有人表示感謝！ 、 本科生畢業(yè)設(shè)計(jì)（論文） 25 附錄 一 Hydraulic shock absorber test bench and applied research on the transformation Preface Hydraulic shock absorber, vehicle suspension system ponents in the main damping, The quality of their performance is directly related to vehicle safety and fort. Hydraulic shock absorber by the performance of the main characteristics that, Characteristics of the shock absorber shock absorber means with relative movement of the displacement or relative velocity with the corresponding resistance resulting from the work of the relationship between, The relationship between these two indicator known as the shock absorber characteristics and speed characteristics. Shock absorber to improve the performance, To ensure the quality, In addition to advanced design, production process, Means of modern management, As well as advanced test and test equipmentTo detect characteristics of the shock absorber with the design requirements, Commonly used testbed general hydraulic shock absorber for dualcolumn structure, The lower cost structure, Small footprint. Jiangxi, a shock absorber in accordance with the requirements of the production plant, In its original twocolumn structure of the hydraulic shock absorber on the basis of testbed transformation. The redesign of the puter detection system, And the application of the shock absorber shock absorber test bench analysis of the quality of the process methodology. This article describes the main technical. 1 Testbed design of the puter detection system 1 ? 1 System Components Imposed on the shock absorber test bed approach is inspired in its one end to impose similar to simple harmonic movement, In this study, using a simple structure, Easy to implement on the heart of the crank linkage system as an incentive. According to the original testbed instability detection system performance, Graphic distortion characteristics and the speed the more serious the situation is not convenient, The redesign of the puter detection system, System Components Figure 1, The system 本科生畢業(yè)設(shè)計(jì)（論文） 26 uses microputer as the main monitoring and control machines, Optional PS2112 16 Road, A / D conversion board and travel as a shock absorber damping force of the two ADC signal, The converter board is programmable interface board, Its resolution of 12, Conversion time of about 25μs, Of 5 ~ +5 V analog signal for analogtodigital conversion, Systematic error of less than 0 ? 1%, to ensure that the detection accuracy. Shock absorber damping force sensor using strain la (pressure) force sensor, Can be used for different force sensor to change the measuring range, Can be used for different force sensor to change the measuring range, Strain gauge used for the preamplifier, Output